Spherical paperboard device



y 3, 1966 A. G. JANUS 3,248,807

SPHERICAL PAPERBOARD DEVICE Filed Jan. 16, 1964 4 Sheets-Sheet 1 5o AK FIE. E

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I N VE N TOR. Arum/p52 6- FM/0s May 3, 1966 A. G. JANUS SPHERICAL PAPERBOARD DEVICE 4 Sheets-Sheet 2 Filed Jan. 16, 1964 E w m a n. O l p W J v 1 m 7 H cm a i 5% am i Qv L R vsm MENU-"N y 3, 1966 A. G. JANUS 3,248,807

SPHERICAL PAPERBOARD DEVICE Filed Jan. 16, 1964 4 Sheets-Sheet 5 IN VENTOR. ham/var 6. flaw/s May 3, 1966 JANUS 3,248,807

SPHERICAL PAPERBOARD DEVICE Filed Jan. 16, 1964 4 SheetsSheet 4 I NVF N TOR. 415140021? 6. $9005 United States Patent O M 3,248,807 SPHERICAL PAPERBOARD DEVICE Alexander G. Janus, Dallas, Tex., assignor to John H. Head, Richardson, 'lex. Filed law. 16, 1964, Ser. No. 338,233 7 Claims. (Cl. 3546) The present invention relates generally to an improved spherical structure, and more particularly to a spherical structure which is adapted to be fabricated from flexible sheet material, the structure being prepared from a plurality of spherical segments or gores, each gore being arranged to be serially joined to an adjacent gore to form a closed substantially spherical shell.

In the preparation of spherical or hemispherical shell structures, a manufacturer is frequently confronted with unusual shipping problems and unusual shipping volume requirements. Unless a suitable nesting arrangement can be employed, the shipping requirements for spherical shells or hemispherical shells may become unreasonable and impose a restrictive burden upon the ability of the manufacturer to properly distribute his product. In accordance with one aspect of the present invention, a substantially spherical shell is adapted to be. fabricated from-a plurality of essentially flat, planar segments or sectors of flexible material. Each of the segments is provided with laterally extending tabs which are specifically adapted to be interlocked both to oppositely disposed tabs from the same segment, and to corresponding or mating tabs which extend or protrude from the lateral edges of adjacent panel segments. Appropriate interlocking means are provided to join the ends of oppositely disposed tabs together, and a suitable pair of mating locking ears and locking slots are provided to secure the individual panel members, one to another. In order to provide a suitable spherical shell, two hemispheres prepared in accordance with the present invention are secured together along a section taken through the center of the sphere, the hemispheres being adjoined, one to another, along a plane which corresponds to the common base plane of the individual spherical panel segments or gores. The origins of each of the panel segments or gores converge at polar points, these polar points being disposed 9.0 degrees from the base plane along which the individual hemispheres are joined. In order to provide rigidity for each of the hemispherical elements, a reinforcing rib is adapted to be inserted along a channel which is formed from the elongated laterally extending tabs during the assembly process or operation, the edge surface of the arcuate reinforcing rib having an outer radius which is substantially equal to the radius of the hemispherical shell. In addition, when the sphere is entirely assembled, an axial reinforcing rod, sleeve, of the like extends diametrically between the polar points of the two hemispheres. Suitable latching or locking means may be employed to retain the two individual hemispheres together. The resultant is a substantially rigid, substantially spherical shell which is readily adapted for a variety of uses. One use which the apparatus of the present invention is peculiarly adapted is that of forming a global map of the world. In this connection, each of the panel segments has indicia imprinted on the face thereof each segment corresponding to individual sectors of the world. For convenience, the hemispheres may individually represent the Northern hemisphere and the Southern hemisphere, with the gores of each hemisphere meeting at a common point represented by the north and south poles respectively, and with suitable seams being provided along individual longitudinal divisions of the map of the globe. Of course, it will be appreciated that other uses are readily indicated for 3,248,807 Patented May 3, 1966 a spherical shell prepared in accordance with the present invention.

Therefore, it is an object of the present invention to provide an improved spherical shell, the shell being fabricated from flexible material and being prepared from a plurality of spherical panel segments which are adapted to be serially joined along the lateral and base edge surfaces thereof to form a closed that is substantially spherical shell.

It is a further object of the present invention to provide an improved spherical or hemispherical shell which is fabricated from a plurality of individual spherical panel segments, each segment comprising a planar element, these planar elements being adapted to be joined along the lateral and base edge surfaces in a serial fashion so as to form a closed substantially spherical shell.

It is yet a further object of the present inventionto provide a substantially rigid spherical shell fabricated from a plurality of flexible spherical segments, and being reinforced along the seams between adjoining panel segments.

It is still a further object of the present invention to provide an improved spherical shell which is fabricated from a plurality of flexible spherical panel segments, and which is reinforced so as to form a substantially rigid assembly, the assembly including an axial reinforcing member which extends diametrically of the spherical panel assembly, the origin of each of the spherical panel segments being disposed adjacent to the diametrically disposed reinforcing member.

Other objects of the present invention will become apparent to those skilled in the art upon a study of the following specification, appended claims, and accompanying drawings, wherein:

FIGURE 1 is a front elevational view of a global map of the world prepared from a plurality of spherical panel segments arranged in accordance with the present invention, and being disposed on a suitable display stand;

FIGURE 2 is a combined top plan view and edge view of a fiat planar sheet of a spherical panel segment arranged in accordance with the present invention, with the planar panel being appropriately cut and scored;

FIGURE 3 is a bottom plan view of the panel segment of FIGURE 2, the panel segment being shown in partially completed form;

FIGURE 4 is an end view of the panel shown in FIGURE 3;

FIGURE 5 is a plan view, taken from the inner radius, of a pair of individual spherical panel segments arranged in accordance with the present invention, and joined one to another along the lateral edges thereof;

FIGURE 6 is a top plan view of a circular ring which is adapted to be joined to the individual panel members along the base edge surfaces thereof;

FIGURE 7 is an end view of the circular ring of FIGURE 6;

FIGURE 8 is a plan view taken radially inwardly, of a plurality of spherical panel segments secured together serially, one to another, and forming a hemisphere assembly, the hemisphere being joined to the circular reinforcing ring shown in FIGURE 6;

FIGURE 9 is a vertical sectional view taken through the radius of a pair of joined hemispheres, and showing the axial reinforcing member which is utilized to both join the hemispheres, one to another, and to reinforce the completed structure; and

FIGURE 10 is a partial sectional View taken along the line and in the direction of the arrows 1010 of FIG- URE 9.

In accordance with preferred modification of the present invention, in FIGURE 1 there is shown a global map of the world generally designated 10, the structure having been prepared in accordance with the present invention. The structure 10, which has substantially the form of a spherical shell, comprises two hemispherical shells 11 and 12 which are joined together along a median plane as at 13. The spherical shell is supported on an axial shaft 15, with the shaft 15 being supported in turn on a stand 16. Suitable mounting means are interposed between the shaft 15 and the stand 16 as at 17 for securing the shaft to the stand element. A locking nut or cap screw 18 is provided at the end of the shaft 15 and acts as a retainer for holding the sphere 10 on the shaft 15. Each of the hemispheres 11 and 12; is fabricated from a group of twelve serially joined spherical segment panels.

Particular attention is now directed to FIGURE 2 wherein there is shown, on the right, in plan view, a spherical panel segment in accordance with the present invention and generally designated 20. The panel 20 is printed, scored, and arranged within the larger flexible fiber sheet 21, thesheet 21 being fabricated, for example, from flexible construction paper, cardboard or the like. Accordingly, conventional printing and scoring techniques may be utilized in the preparation of the panel 20 within the confines of the square sheet 21. Referring now in detail to vthe flexible spherical panel segment 20, it will be ,seen that the segment includes a face portion 23 which normally is provided with printed indicia in accordance with theuse to which the sphere is being put. The form of the panel 23 is that of a gore forming /12 of a hemisphere which will ultimately form one segment of the spherical shell being fabricated. In this connection, the panel has a pair of lateral edges 24 and 25 along with a base edge The lateral edges 24 and 25 of the panel 23 meet at an origin point as at 27, the origin being adapted to be situated at one of the poles of the sphere ultimately formed. A plurality of elongated tab members are provided which extend outwardly in oppositely disposed relationship from each lateral edge of the face panel portion, these tab members being identified as 39, 31, 32, 33, 34, 35, 36 and 37 along with corresponding cooperating elongated tab members 39A-37A inclusive. Each of the elongated tab members, with the exception of that tab member which is most closely adjacent the origin, is provided with an interlocking slot by which each tab may be securely joined to its oppositely disposed cooperating tab. For example, the interlocking slot means as at 39 and 39A are adapted and arranged to be joined, one to another, as is indicated and described in FIGURE 3. In this connection, the elongated tabs and EllA are folded upon themselves at a scored mid-line 40 and 41 respectively. This folding operation provides the arrangement as is shown at 31 and 31A respectively in FIGURE 3. Further score lines are provided at 42 and 43, and also'along the lateral edge lines 24 and 25 for a purpose to be described in greater detail hereinafter. Each of the elongated tabs 30-37 inclusive have a pair of locking slots arranged therein and defined by score lines. These locking slots are formed by the removal of knock-outs which are adapted to be physically removed from the structure, these locking slots as formed being shown at 48 and 49. When the individual elongated tabs are ultimately folded along the extension of the score lines 40, 42 and 24, the locking slots 48 and 49 are in superimposed relationship and define a single locking slot aperture for receiving a cooperating locking ear therein. Referring now to the other group of elongated tabs, for example, the tabs SBA-37A inclusive, it will be observed that each tab includes a pair of locking cars 50 and 51. Inasmuch as each of the locking ears-are identical one to another, for the purposes of clarity the description will be confined to the specific locking ears 50 and 51. The locking ears are scored along a major portion of their periphery, the exception being along the center of the base lines one of which adjoins the lateral edge 25, and the other of which lies along the extension of the score line 41. Thus, each of the locking cars 50 and 51 is hingedly secured to the respective tab along the base line thereof. In order to form a more positive locking action with the locking slot, a pair of finger areas 53 and 54 along the base are physically removed as knock-outs from the remainder of the locking ear. Again, inasmuch as each of the locking ears is identical, one to another, the specific description is confined solely to the locking ear 5%. When the locking tab is folded upon itself, and ultimately folded in the manner illustrated at 30A of FIGURES 3 and 4, the locking ears will be arranged and disposed as shown at FIG- URE 4.

As the lines defining the lateral edge surfaces 24 and 25 of the gore panel converge toward the origin 27, the score lines it? and 41, and the extensions thereof, mutually diverge. In this connection, however, the median score lines 42 and 43 are substantially parallel. Thus, as the individual tab members are folded and caused to assume a configuration shown in FIGURES 3 and 4, a composite channel is created along the lateral edge of the individual panel segment. As the face or gore of the unit is curved to the configuration desired in the spherical shell, for example, the structure shown in FIGURE 3 being curved concavely to the reader, the channels will assume a substantially straight line form or relationship. The purpose of this channel is to receive a reinforcing rib such as is described more fully hereinafter.

Referring now in particular to FIGURE 2, it will be observed that adjacent to the base line 26, a group of three tabs are situated and extend therefrom, these tabs being identified as tabs 55-55. The base edge seam 26 of the panel is scored in order to facilitate easy folding of the tab members 55-5-5 relative to the face of the panel 23. The ultimate purpose of the tab members 55-55 is to be received in locking engagement with locking ports provided in a center circular reinforcing plate. The plate is shown in detail in FIGURES 6 and 7, along with the locking ports 61-61 which are adapted to receive the locking prongs 56 of each of the base tab extensions 55-55. Inasmuch as each of the tabs 55-55 is identical, one to another, in the interest of clarity only one locking prong 56 has been indicated.

Attention is now directed to FIGURES 6 and 7 wherein there is illustrated a circular reinforcing disc generally designated 60. The disc 60 is provided with a plurality of annularly disposed locking ports 61-61, these ports, as previously indicated, being adapted to receive the locking prongs 56-56 of the base tab extensions 55-55. The reinforcing disc 60 is provided with diametrical reinforcing elements 62-62, the remaining quadrant portions being scored and thereby enabling their removal from the confines of the circular panel 60. Each of the quadrants includes, for economy and convenience, a pair of reinforcing ribs such as the ribs 63-63, these ribs being adapted to be inserted within the confines of the channel formed between the individual joined segments. In order to accommodate the central shaft or axis through the sphere, the center of the circular disc 60 is scored in order to provide for ready removal of the center 65. Also contained within this panel are a pair of polar end caps 66-66 which are adapted to be disposed along the ends of a reinforcing rod which passes through the diametrical center of the spherical shell, the caps 66-66 being adapted to receive the origins of the individual spherical segments, at a common point and in adhesively bonded relationship therewith. The center of the individual caps 66-66 is likewise scored to permit removal in order to allow the shaft 15 to pass therethrough. After removal of the quadrants along with the center 65 and the caps 66-66 and the circular reinforcing member 60 appears substantially as is shown in FIG- URE 8. This figure also shows the further accomplishment of a plurality of segments being joined to the reinforcing disc.

Particular attention is now directed to FIGURE 9 wherein a pair of hemispheres prepared in accordance [H O with the present invention are illustrated, the spherical segments being shown along a plane taken substantially through the poles thereof, and normal to the plane of the juncture between the hemispheres. In this connection, a center hollow reinforcing shaft 70 is provided which extends from pole-to-pole. The end caps 66-66 are arranged in contact with the ends of the pole 70, the origin points of each of the individual segments being received and directed to a common point on the cap members 66-66. In addition, if desired, an outer pole cap 72 and 73 may be interposed between the retaining means and the spherical shell. In this regard, the shield or cap 72 is interposed between the cap screw 18 and the origin areas of the individual spherical segments, while the shield 73 is interposed between the origin areas of the various spherical segments and a wedge or collar 75 along the support rod 15.

In order to properly assemble a sphere in accordance with the present invention, the operator initially removes the segments from the confines of the various panels and arranges them for further disposition. Particular attention is directed to FIGURE 3 wherein the initial assembly operation is clearly illustrated. In this regard, the longitudinally extending tabs 30-36 and 30A-36A respectively are folded upon themselves and interlocked at the extremities thereof. Following the interlocking operation, the individual tabs are then folded along their score lines as at 40 and along the lateral side 24 of the panel, the resultant operation producing a radially inwardly disposed pair of tabs such as is illustrated at 78 and 79 of FIGURE 4. It will be appreciated that the tabs 78 and 79 are identical to and correspond with the tab members 30 and 30A, the additional numeral being utilized for increasing the clarity. This operation is continued until each of the tabs 30-36 and 30A-36A respectively have been formed in the manner designated at 78 and 79. At this time, the tabs 37 and 37A are also folded upon themselves along the score lines 40 and 45 respectively, and these tabs are then being formed in the manner designated at 78 and 79. Because of the proximity of tabs 37 and 37A to the origin of the gore or spherical segment, it is generally not essential that the tabs be interlocked as is done in the remaining tabs.

Attention is now directed to FIGURE wherein the next step in the assembly series is illustrated. In this connection, two individually prepared spherical segment panels are placed in side-by-side abutting relationship. The locking ears of one segment are pivoted downwardly through the confines of the locking slot combination 48 49. As is indicated, the profile of the locking slot combination 4849 provides a means for forming a pair of locking or retaining shoulders 48A and 49A respectively. These locking shoulders permit the passage of the looking ears 5t)51, particularly when the finger areas 53 and 54 have been removed from the locking ears. Accordingly, each locking ear pair is moved pivotally downwardly through the locking slot, and into a disposition by which they are substantially parallel to the outer surface of the individual spherical segments or gores. Upon completion of this joining operation, the assembly will assume a curved configuration which is concave to the reader, as illustrated in FIGURE 5. This assembly op eration is continued until a sufiicient number of spherical segments have been mutually adjoined, and a sufficient number of gores are available to form a hemisphere. In the embodiment shown in this application, a plurality of twelve gores are utilized for each hemisphere. If certain indicia such as, for example, a global map or the like are presented along the surface of the gores, the selection of individual gores must come of course, following a preselected pattern. A suitable numbering scheme or the like may be utilized in order to expedite the selection of the individual pattern.

After the individual hemispheres have been prepared from the group of individual segments or gores, reinforcing ribs such as the ribs 63, may be inserted into the channel means which are formed in the confined area established when the elongated tabs are turned upon themselves. As previously indicated, the score lines which are formed along these tabs are arranged in divergent relationship, one to another, relative to the lateral seam lines of the individual spherical panels or gores. Thus, the height dimension of the channels is the greatest at the point adjacent the origin of the spherical segment. The reinforcing ribs 63 may thus be inserted into these channels to an extent whereby the rib will become locked against the confines of the channel. The profile of the reinforcing rib is adapted to match the profile of the channels, hence the rib may become snugly fitted within the confines of the individual channels. Particular attention is directed to FIGURE 9 wherein the composite structure of the channels and reinforcing ribs are shown, the reinforcing ribs being illustrated, in part, in phantom. If desired, a triangular reinforcing panel may be inserted under the individual locking tabs, the reinforcing panel having substantially the planar configuration of the indi- V vidual gore.

Following the insertion of the reinforcing ribs, the circular reinforcing rim is then ready to be attached or secured to the bases of the individual spherical segments. As previously indicated, the tabs 56 are folded radially inwardly along the score line 26 at the base of the spherical segment, and the blocking prong 56 is inserted into the confines of the annularly disposed locking slots 61-61. Obviously, these locking prongs 56-56 have a sufficiently large transverse dimension so as to prevent their escaping from the confines of the locking ports 61-61. In this regard, a blocking shoulder or the like 67 is provided in order to more securely retain the tab within the confines of the locking port 61. The assembly operation is indi cated in FIGURE 8 of the drawings, the operation being substantially complete in this figure. The penultimate locking tab is shown as it is being folded radially inwardly, and before it is pressed into contact with the port 61. The final tab to be inserted is also shown at approximately the eleven oclock position, and immediately to the right of the penultimate tab being inserted. After this operation is accomplished, the hemisphere is complete.

Following the assembly of 'two complete hemispheres, a sphere may be fabricated therefrom in accordance with the operation illustrated in FIGURE 9. In this connection, a support post or rod 70 is inserted diametrically through each of the hemispheres. The axis of the reinforcing rod or shaft 70 coincides with the axis of the polar caps 66-66 which have previously been utilized to provide a suitable support for the individual origin points for the spherical panel segments. Following insertion of the pole member, a pair, of outer retainer caps 72 and 73 may be positioned coaxially with the caps 66-66, and the shaft 15 may then be passed diametrically through the center of the hemisphere pair. A shoulder 75 supports the hemisphere pair along the lower pole area, while the cap screw 18 supports the hemisphere pair at the other pole area. If desired, and in order to conceal the seam which exists along the juncture point of the bases of the individual spherical panel segments or gores, a suitable tape or the like may be used to cover this area of the individual hemisphere pairs.

It will be appreciated that while various specific ernbodiments of the apparatus of the present invention have been illustrated and described herein, those skilled in the art will be able to depart from these specific examples without actually departing from the spirit and scope of the I present invention. Therefore, these specific illustrations are provided for purposes of illustration only, and are not to be otherwise construed as a limitation upon the scope of the present invention.

What is claimed is:

1. Flexible spherical panel segments adapted to be serially joined along the lateral edge surfaces thereof to form a closed spherical shell, each of said panel segments comprising:

(a) a spherical segment face panel portion representing one gore of the spherical shell to be formed,

(b) a plurality of first and second elongated tab members extending laterally outwardly and in oppositely disposed relationship from each lateral edge of said face panel portion and adjoining said face along a lateral sea m, each tab being foldable upon itself, having interlocking means adapted to engage an oppositely disposed tab in locking relationship one with another, at least one locking ear formed in a first elongated tab member and disposed adjacent to said lateral seam, at least one locking slot in a second elongated tab member and disposed adjacent said lateral seam, and being further arranged to receive a locking ear in cooperative relationship therewith. 2. In combination, flexible spherical panel segments and at least one reinforcing rib therefor, each panel segment being adapted to be serially joined to a similar segment along the lateral edge surfaces thereof to form a closed spherical shell, each of said panel segments comprising:

(a) a spherical segment face panel portion representing one gore of the spherical shell to be formed, (b) a plurality of first and second elongated tab members extending laterally outwardly and in oppositely disposed relationship from each lateral edge of said face panel portion and'adjoining said face along a lateral seam, each elongated tab being foldable upon itself, having interlocking means adapted to engage an oppositely disposed elongated tab in locking relationship therewith and further being adapted when so folded, to form a composite circumferential channel each elongated tab portion forming the channel being foldable substantially normally and inwardly to the face panel portion, at least one locking ear formed in at least one first elongated tab member and disposed adjacent to said lateral seam, at least one locking slot formed in a second elongated tab memcharacterized in that said composite channels have a progressively decreasing radial height dimension from one channel end to the other, and said reinforcing ribs have a substantially matching progressively decreasing height dimension and are adapted to be snugly received within said composite channels.

4. The combination as defined in claim 2 being particularly characterized in that the outer edge surface of said arcuate reinforcing rib has an outer radius substantially equal to the radius of said spherical shell.

5. The combination as defined in claim 2 being particularly characterized in that an arcuate reinforcing rib is provided for each joint between adjacent panel segments.

6. In combination, flexible spherical panel segments adapted to be serially joined along the edge surfaces thereof to form a closed spherical shell and a circular ring having locking slots therein adapted to be joined to 8 said segments along the base edge of the panel segments, each of said panel segments comprising:

(a) a spherical segment face panel portion having two lateral edges and one base edge and representing one gore of the spherical shell to be'formed,

(b) a plurality of first and second elongated tab members extending laterally outwardly and in oppositely disposed relationship from each lateral edge of said face panel portion and adjoining said face along a lateral seam, each elongated tab being foldable upon itself and having interlocking means adapted to engage an oppositely disposed elongated tab in locking relationship therewith and further being adapted to form a circumferential composite channel when so folded, each elongated tab forming the compositechannel being foldable substantially normally and radially inwardly to the face panel portion, at least one locking ear formed in a first elongated tab member and disposed adjacent to said lateral seam, at least one locking slot formed in a second elongated tab member and disposed adjacent said lateral seam and being further arranged to receive a locking ear in cooperative relationship therewith, and third tab members extending outwardly from the base edge of said face panel portion, said third tab members having locking ears adapted to be received in the locking slots of said circular ring.

7. Flexible spherical panel segments adapted to be serially joined along the lateral edge surfaces thereof to form a closed spherical shell, each of said panel segments comprising: 6

(a) a spherical segment face panel portion having a base edge, and a pair of lateral edges intersecting said base edge and meeting at an orgin, the face panel representing one gore of the spherical shell to be formed,

(b) a plurality of first and second elongated tab members extending laterally outwardly and in oppositely disposed relationship from each lateral edge of said face panel portion and, adjoining said face along a lateral seam, each tab being foldable upon itself, having interlocking means adapted to engage an oppositely disposed tab in locking relationship one with another, at lea-st one locking ear formed in a first elongated tab member and disposed adjacent to said lateral seam, at least one locking slot in a second elongated tab member and disposed adjacent said lateral seam, and being further arranged to receive a locking ear in cooperative relationship therewith,

(0) means for joining a plurality of spherical panel segments along the origin thereof to form a hemisphere,

(d) means for mutually joining said hemispheres along the base edges of the panel segments to form a sphere, and

(e) axial reinforcing means disposed diametrically through said hemispheres from one polar origin point to the other.

References Qited by the Examiner UNITED STATES PATENTS 2,352,225 6/1944 Riddiford 35-46 2,378,115 6/1945 Von Siegl 3546 2,436,860 3/1948 Fisher "35-46 EUGENE R. CAPOZIO, Primary Examiner. 

1. FLEXIBLE SPHERICAL PANEL SEGMENTS ADAPTED TO BE SERAILLY JOINED ALONG THE LATERAL EDGE SURFACES THEREOF TO FORM A CLOSED SPHERICAL SHELL, EACH OF SAID PANEL SEGMENTS COMPRISING: (A) A SPHERICAL SEGMENT FACE PANEL PORTION REPRESENTING ONE GORE OF THE SPHERICAL SHELL TO BE FORMED, (B) A PLURALITY OF FIRST AND SECOND ELONGATED TAB MEMBERS EXTENDING LATERALLY OUTWARDLY AND IN OPPOSITELY DISPOSED RELATIONSHIP FROM EACH LATERAL EDGE OF SAID FACE PANEL PORTION AND ADJOINING SAID FACE ALONG A LATERAL SEAM, EACH TAB BEING FOLDABLE UPON ITSELF, HAVING INTERLOCKING MEANS ADAPTED TO ENGAGE AN OPPOSITELY DISPOSED TAB IN LOCKING RELATIONSHIP ONE WITH ANOTHER, AT LEAST ONE LOCKING EAR FORMED IN A FIRST ELONGATED TAB MEMBER AND DISPOSED ADJACENT TO SAID LATERAL SEAM, AT LEAST ONE LOCKING SLOT IN A SECOND ELONGATED TAB MEMBER AND DISPOSED ADJACENT TO RECEIVE LATERAL SEAM, AND BEING FURTHER ARANGED TO RECEIVE A LOCKING EAR IN COOPERATIVE RELATIONSHIP THEREWITH. 